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Finding the Fourth Proportional to 455,425.20, 683,137.80 and 448,426.80

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Solution

The fourth proportional to 455,425.20, 683,137.80 and 448,426.80 is: 672,640.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,425.20 : 683,137.80 = 448,426.80 : x
  2. Step 2: Convert to fraction form
    455,425.20/683,137.80 = 448,426.80/x
  3. Step 3: Cross multiply
    455,425.20x = 683,137.80 × 448,426.80
  4. Step 4: Simplify right side
    455,425.20x = 306,337,297,613.04
  5. Step 5: Solve for x
    x = 306,337,297,613.04/455,425.20
  6. Step 6: Final answer
    x = 672,640.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.